<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 搜索与添加区域 -->
            <el-row :gutter="20">
                <el-col :span="7">
                    <!-- 搜索与添加区域 -->
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
                </el-col>
            </el-row>

            <!-- 用户列表区域 -->
            <el-table :data="userlist" border stripe>
                <el-table-column label="#" type="index"></el-table-column>
                <el-table-column label="姓名" prop="username"></el-table-column>
                <el-table-column label="邮箱" prop="email"></el-table-column>
                <el-table-column label="电话" prop="mobile"></el-table-column>
                <el-table-column label="角色" prop="role_name"></el-table-column>
                <el-table-column label="状态">
                    <template slot-scope="scope1">
                        <el-switch v-model="scope1.row.mg_state" @change="userStateChange(scope1.row)">
                        </el-switch>
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="180px">
                    <template slot-scope="scope">
                        <!-- 修改按钮 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">
                        </el-button>
                        <!-- 删除按钮 -->
                        <el-button type="danger" icon="el-icon-delete" size="mini"
                            @click="removeUserById(scope.row.id)"></el-button>
                        <!-- 分配角色按钮 -->
                        <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                            <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
                        </el-tooltip>
                    </template>
                </el-table-column>
            </el-table>

            <!-- 分页区域 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum" :page-sizes="[1, 2, 5, 10]" :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper" :total="total">
            </el-pagination>
        </el-card>
        <!-- 添加用户的对话框 -->
        <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input v-model="addForm.password"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">
                    取 消
                </el-button>
                <el-button type="primary" @click="addUser">
                    确 定
                </el-button>
            </span>
        </el-dialog>
        <!-- 修改用户的对话框 -->
        <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <!-- 修改内容主体区域 -->
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
                <el-form-item label="用户名">
                    <el-input v-model="editForm.username" disabled></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="editForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="editForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">
                    取 消
                </el-button>
                <el-button type="primary" @click="editUserInfo">
                    确 定
                </el-button>
            </span>
        </el-dialog>
        <!-- 分配角色的对话框 -->
        <el-dialog
            title="分配角色"
            :visible.sync="setRoleDialogVisible"
            width="50%" @close="setRoleDialogClosed">
            <div>
                <p>当前的用户: {{ userInfo.username }}</p>
                <p>当前的角色: {{ userInfo.role_name }}</p>
                <p>分配新角色:
                    <el-select v-model="selectedRoleId" placeholder="请选择">
                        <el-option
                            v-for="item in roleslist"
                            :key="item.id"
                            :label="item.roleName"
                            :value="item.id">
                        </el-option>
                    </el-select>
                </p>
                <!-- <p>{{ selectedRoleId }}</p> -->
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>    
    </div>
</template>

<script>
export default {
    data() {
        // 验证邮箱的规则
        var checkEmail = (rule, value, cb) => {
            // 验证邮箱的正则表达式
            const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;

            if (regEmail.test(value)) {
                // 合法的邮箱
                return cb()
            }

            cb(new Error('请输入合法的邮箱'));
        };
        // 验证手机号的规则
        var checkMobil = (rule, value, cb) => {
            //验证手机号的正则表达式
            const regMobile =
                /^(0|86|17951)?(13[0-9]|[15[012345679]]|17[678]|18[0-9]|14[57])[0-9]{8}$/;
            if (regMobile.test(value)) {
                return cb();
            }

            cb(new Error('请输入合法的手机号'))
        };
        return {
            // 获取用户列表的参数对象
            queryInfo: {
                query: '',
                // 当前的页数
                pagenum: 1,
                // 当前每页显示条数
                pagesize: 2
            },
            userlist: [],
            // 所有角色的数据列表
            roleslist: [],
            total: 0,
            // 控制添加用户对话框的显示与隐藏
            addDialogVisible: false,
            // 控制修改用户对话框的显示与隐藏
            editDialogVisible: false,
            // 控制分配角色对话框的显示与隐藏
            setRoleDialogVisible: false,
            // 添加用户的表单数据
            addForm: {
                username: '',
                password: '',
                email: '',
                mobile: ''
            },
            // 添加表单的验证规则对象
            addFormRules: {
                username: [
                    {
                        required: true,
                        message: '请输入用户名',
                        trigger: 'blur'
                    },
                    {
                        min: 3,
                        max: 10,
                        message: '用户名的长度在3~10个字符之间',
                        trigger: 'blur'
                    }
                ],
                password: [
                    {
                        required: true,
                        message: '请输入密码',
                        trigger: 'blur'
                    },
                    {
                        min: 6,
                        max: 15,
                        message: '用户名的长度在6~15个字符之间',
                        trigger: 'blur'
                    }
                ],
                email: [
                    {
                        required: true,
                        message: '请输入邮箱',
                        trigger: 'blur'
                    },
                    {
                        validator: checkEmail,
                        trigger: 'blur'
                    }
                ],
                mobile: [
                    {
                        required: true,
                        message: '请输入手机号',
                        trigger: 'blur'
                    },
                    {
                        validator: checkMobil,
                        trigger: 'blur'
                    }
                ]
            },
            // 查询到的用户信息对象
            editForm: {},
            // 修改表单的验证规则对象
            editFormRules: {
                email: [
                    {
                        required: true,
                        message: '请输入用户邮箱',
                        trigger: 'blur'
                    },
                    {
                        validator: checkEmail,
                        trigger: 'blur'
                    }
                ],
                mobile: [
                    {
                        required: true,
                        message: '请输入用户手机号',
                        trigger: 'blur'
                    },
                    {
                        validator: checkMobil,
                        trigger: 'blur'
                    }
                ]
            },
            // 需要被分配角色的用户信息
            userInfo: {},
            // 已选中的角色id值
            selectedRoleId: ''
        }
    },
    created() {
        this.getUserList();
    },
    methods: {
        async getUserList() {
            const { data: res } = await this.$http.get('users', {
                params: this.queryInfo
            });
            console.log(res);
            if (res.meta.status !== 200)
                return this.$message.error('获取用户列表失败');
            this.userlist = res.data.users;
            this.total = res.data.total;
        },
        // 监听pagesize改变的事件
        handleSizeChange(newSize) {
            console.log(newSize);
            this.queryInfo.pagesize = newSize;
            this.getUserList();
        },
        // 监听页码值改变的事件
        handleCurrentChange(newPage) {
            console.log(newPage);
            this.queryInfo.pagenum = newPage;
            this.getUserList();
        },
        // 监听 switch 开关状态的改变
        async userStateChange(userinfo) {
            console.log(userinfo);
            const { data: res } = await this.$http
                .put(`users/${userinfo.id}/state/${userinfo.mg_state}`);
            if (res.meta.status !== 200) {
                userinfo.mg_state = !userinfo.mg_state;
                return this.$message.error('更新用户状态失败');
            };
            this.$message.success('更新用户状态成功');
        },
        // 监听添加用户对话框的关闭事件
        addDialogClosed() {
            this.$refs.addFormRef.resetFields();
        },
        // 监听修改用户对话框的关闭事件
        editDialogClosed() {
            this.$refs.editFormRef.resetFields();
        },
        // 点击按钮, 添加新用户
        addUser() {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return
                // 可以发起添加用户的网络请求
                const { data: res } =
                    await this.$http.post('users', this.addForm);
                if (res.meta.status !== 201) {
                    this.$message.error('添加用户失败!');
                }
                this.$message.success('添加用户成功!');
                // 隐藏添加的对话框
                this.addDialogVisible = false;
                // 重新获取用户的列表
                this.getUserList();
            });
        },
        // 展示编辑用户的对话框
        async showEditDialog(id) {
            const { data: res } =
                await this.$http.get('users/' + id);
            if (res.meta.status !== 200) {
                return this.$message.error('查询用户失败!');
            }
            this.editForm = res.data;
            this.editDialogVisible = true;
        },
        // 修改用户信息并提交
        editUserInfo() {
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return;
                // 发起修改用户信息的数据请求
                const { data: res } = await this.$http.put('users/' + this.editForm.id,
                    {
                        email: this.editForm.email,
                        mobile: this.editForm.mobile
                    }
                );
                if (res.meta.status !== 200) {
                    return this.$message.error('更新用户信息失败!');
                }
                // 关闭对话框
                this.editDialogVisible = false;
                // 刷新数据列表
                this.getUserList();
                // 提示修改成功
                this.$message.success('修改用户成功');
            });
        },
        // 根据Id删除对应的用户信息
        async removeUserById(id) {
           // 弹框询问用户是否删除数据
           const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', 
                {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }
            ).catch(err => err); 
            // 如果用户确认删除, 则返回值为字符串 confirm
            // 如果用户取消删除, 则返回值为字符串 cancel
            // console.log(confirmResult);
            if(confirmResult !== 'confirm') {
                return this.$message.info('已经取消删除!')
            }
            const {data: res} = await this.$http.delete('users/' + id);
            if(res.meta.status !== 200) {
                return this.$message.error('删除用户失败!');
            }
            this.$message.success('删除用户成功!');
            this.getUserList();
        },
        // 展示分配角色的对话框
        async setRole(userInfo){
            this.userInfo = userInfo;

            // 在展示对话框之前获取所有角色的列表
            const {data: res} = await this.$http.get('roles');

            if(res.meta.status !== 200) {
                return this.$message.error('获取角色失败!');
            }

            this.roleslist = res.data;

            this.setRoleDialogVisible = true;
        },
        // 点击按钮分配角色
        async saveRoleInfo(){
            if(!this.selectedRoleId){
                return this.$message.error('请选择要分配的角色!');
            }

            const{data: res} = await this.$http.put(`users/${this.userInfo.id}/role`, 
                {rid: this.selectedRoleId});

            if(res.meta.status !== 200) {
                return this.$message.error('更新角色失败!');
            }

            this.$message.success('更新角色成功!');
            this.getUserList();
            this.setRoleDialogVisible = false;
        },
        // 监听分配角色对话框的关闭事件
        setRoleDialogClosed(){
            this.selectedRoleId = '';
            this.userInfo = {};
        }
    }
}
</script>

<style lang="less" scoped></style>